partial patch/partial by-hand merge of 2.X commits 3169&3170 to 3.X codebase

git-svn-id: svn://localhost/ardour2/branches/3.0@4300 d708f5d6-7413-0410-9779-e7cbd77b26cf

gtk2_ardour/matrix.h

@@ -0,0 +1,106 @@
+#ifndef __gtk_ardour_matrix_h__
+#define __gtk_ardour_matrix_h__
+
+#include <list>
+#include <vector>
+#include <string>
+#include <stdint.h>
+
+#include <gtkmm/eventbox.h>
+#include <gtkmm/widget.h>
+
+#include "port_group.h"
+
+class OtherPort {
+public:
+    OtherPort (const std::string& n, PortGroup& g)
+	    : _name (n), _group (g) {}
+
+    std::string name() const { return _name; }
+    PortGroup& group() const { return _group; }
+    bool visible() const { return _group.visible; }
+
+public:
+    std::string _name;
+    PortGroup& _group;
+};
+
+class MatrixNode {
+  public:
+    MatrixNode (std::string a, OtherPort o, int32_t x, int32_t y)
+	    : _name (a), them (o), _connected (random()%3), _x(x), _y(y) {}
+    ~MatrixNode() {}
+
+    PortGroup& get_group() const { return them.group(); }
+
+    std::string our_name() const { return _name; }
+    std::string their_name() const { return them.name(); }
+
+    bool connected() const { return _connected; }
+    void set_connected (bool yn) { _connected = yn; }
+    int32_t x() const { return _x; }
+    int32_t y() const { return _y; }
+
+  private:
+    std::string _name;
+    OtherPort them;
+    bool _connected;
+    int32_t _x;
+    int32_t _y;
+};
+
+class Matrix : public Gtk::EventBox
+{
+  public: 
+    Matrix();
+
+    void set_ports (const std::list<std::string>&);
+    void add_group (PortGroup&);
+    void remove_group (PortGroup&);
+    void hide_group (PortGroup&);
+    void show_group (PortGroup&);
+
+    int row_spacing () const { return xstep; }
+
+  protected:
+    bool on_button_press_event (GdkEventButton* ev);
+    bool on_expose_event (GdkEventExpose* ev);
+    void on_size_allocate (Gtk::Allocation&);
+    void on_size_request (Gtk::Requisition*);
+    void on_realize ();
+    bool on_motion_notify_event (GdkEventMotion*);
+    bool on_leave_notify_event (GdkEventCrossing*);
+
+    MatrixNode* get_node (int32_t x, int32_t y);
+
+private: 
+    int height;
+    int width;
+    int alloc_width;
+    int alloc_height;
+    bool drawn;
+    int labels_y_shift;
+    int labels_x_shift;
+    float angle_radians;
+    int border;
+    int ystep;
+    int xstep;
+    uint32_t line_height;
+    uint32_t line_width;
+    int arc_radius;
+    int32_t motion_x;
+    int32_t motion_y;
+
+    std::list<std::string> ours;
+    std::list<OtherPort> others;
+    std::vector<MatrixNode*> nodes;
+
+    void reset_size ();
+    void redraw (GdkDrawable*, GdkRectangle*);
+    void alloc_pixmap ();
+    void setup_nodes ();
+
+    GdkPixmap* pixmap;
+};
+
+#endif /* __gtk_ardour_matrix_h__ */